Vertical crushing and grinding mill.



No. 761,334. .TATBNTED MATTI, 1904.

T. L. I T. J..I STURTI-IVANT. 1 VERTICAL @RUSHING AND. GRINDING MILL.

APPLICATION FILED APB. 29, 1903.

mc unms PETERS co. Pnoraumo Msmmr No. 761,334. PATLNTBD MAY 31, 19o/4. T. L. 3 T. J. STURTEVANT. VERTICAL GRUSHINGAND GRINDING MILL.

APPLIOATION FILED un. 29. 1903.

s sHnnTs-sHBT 2.

No MODEL.

t No. 761,334. y PATBNTED MAY 31, 1904.

T. L. A T. J. STURTEVANT. LVERTICAL CRUSHING AND GRTNDING M111..

ArPLIoATIoN Hmm APB. 2,9. 1903. A Y a' SHEETS-SHEET a.

vIO MODEL.

2 7.171 1 2 E pu UNITED STATES Patented May 31, 1904.

"PATENT GEEICE.

THOMAS L. STUETEVANT', OE OUINCY, AND THOMAS J, 'STuETEvANn '-OE. WELLESLEY, MASSACHUSETTS, ASSIGNORS To. STUETEVANT -MILL COMPANY, .OE PORTLAND, MAINE, AND BOSTON, MASSACHUSETTS, A

CORPORATION OE MAINE.

'vi-:RTIVOAL ORUSHING 4AND -GRINDING MILL.v

'SPECIFICATION forming per; of Letters rement No. 761,334, dated Mey 31, 1904.

'" Application ned pril 29, 1903.

T0 all whom 'it may 'cmwla` Be it known that we, THOMAS L. STURTE- vANT, residing at Quincy,and THOMAS J. STUE- TEVANT, residing at Wellesley, in the county of Norfolk and State of Massachusetts, both citi- Izen's lof the United States, have invented certainnew and useful Improvements in Vertical Crushing and Grinding Mills," of which the folf regulated as may be desired by means of convenient adjustments of the grinding shells or i cones by which the iinal'reduction of the material is effected.'y

In the accompanyingidrawings, Figures 1 and 6 are vertical sectional views taken at right angles to eachV other' of'a crushing ,and grinding mill constructed in accordance with the present invention. Fig'. 2 ,isa detailfsectional view of the lowerst'ationary con'el'or shell, and Fig. 3 is a bottom view of 'thesame.` Fig. 4 is a detail sideyiew of the lighter-bar which supports theV lower stationary cone or shell, and Fig. 5 is a plan view of the same.

The frame or casing of the mill may be of` any suitable or desired constructionrbut inl the form herein shown 'said frame orcasing comprises the sections 12, 13', 14, andl, which will be suitably secured together -a`n`dwhich` shells or cones 17 18, and 19, provided in the upper orl hopper por-v seri'ei No. 154,305. (Nq model.)

,usual manner with-internal crushing or reducing teeth.

`Suitably journaled in the frame or casing vof the mill is the main shaft 20, having a ,squared portion on which are mounted the rotating crushing and grinding nuts or cones 2l,`

22, and 23, rotating with said shaft, the latter being preferably stepped in a supporting oilpot 24:, which rests upon a cross-bar 25.. The 55 crosS-bar 25 is'in' practice provided with suit- .;able means for adjustment, such as is common in grinding-mills, so that the oil-pot 24 may be raised or lowered in the base ofthe mill frame or casing to raise and ulower the main 'shaft 2O for the purpose of adjustingsthe rotary crushing and grinding shells or cones relative to they encircling stationary grinding .shellsor cones.' and thereby regulating the )Output of the mill.-

Infthe gear-chamberat the base of the mill y is mounted the driving gear-wheel 26, engagedl by a pinion 27 on a .po wer-Shaft 28. The gearwheel 26 is preferably connected with the vertical'shaft 2O through a hub 271, mounted on a squared portion of said shaft, and the lower portion of which hub is connected with the 'hub of the said gear-wheel throughl 4a kgrab lcoupling or clutch 29, -formed partly on said hub 271 and partly-on the hub of the said gearwheel,l Attached to the hub 271, to rotate material to the'outlet spout or spouts 3l. The

therewith, are Scrapers 30, which move around' in the lower part of the material-chamber of the milland which serve to convey the reduced ihub 271 is preferably providedwith an annu" reduction of the material in the upper part of the mill can be accomplished much faster than ing 'members-to wit, the outer or stationary shell or cone 19, the intermediate V'rotating shell or cone 23, and an inner stationary shell or cone 34, between which and the outer stationary shell or cone the intermediate rotating and double-faced shell or c'one'23'is interposed, all of these shells or cones having teeth or ribs of suitable shape to enable them to perform their crushing or grinding reducing action. Theinner stationary shell or cone 34 is supported on a lighter-bar 35,the ends of which extend into recesses 36 in the section 13 of the machine-frame. The central portion of the said lighter-bar is made in the form of a ring loosely encircling the hub 271, and said ring is provided on its upper side with lugs 37, loosely entering recesses or notches formed in the lower face of the stationary shell or cone 34 in such a manner as to hold the said shell or cone from turning with the rotating vertical' shaft, but permitting it to center itself more or less when in operation.

The lighter-bar 35, which supports the in'- ner stationary shell or cone 34, rests on the heads of threaded rods or bolts 38, provided with hand-wheels 39, which may be turned to effect a vertical adjustment of the said lighterbar and of the stationary cone 34, supported thereby'. The intermediate shell or cone 23 is supported by a key 40 passing through the shaft 20, so that a vertical adjustment of the said shaft will effect avertieal adjustment of the said cone orv shell 23, thereby providing by the independent vertical adjustments of v the said shells lor cones 23 and 24 for properly regulating the fineness of the output of the crushed material. The intermediate rotating shell or cone 23 isprovidedwith openings 41, through which a portion of the material coming from above can pass between the said rotating shell :or cone andthe inner Stationary shell or cone 34, and thus inthe operation of the machine the final 4reduction of the material will take place in the two crushing chambers or spaces between the shells or cones 19, 23, and 34. Having thus described our invention, we claim and desire to secure by Letters Patent 1. In a vertical crushing-mill, the combination with a central vertical driving-shaft, 20, provided near its lower end with a drivinggear 26, of a vertically-adjustable support in which the lower end of said shaft is stepped, outer and inner stationary shells or cones, as

19 and 34, and an intermediate shell or cone, as 23, hung to said shaft so as to rotate and to be vertically adjustable therewith and provided with openings to admit material into the inner chamber formed by the said three shells or cones,

2. In a vertical crushing-mill, the com bination with a central vertical drivii'ig-shaft 20, provided near its lower end with a drivinggear 26, of a vertically-adjustable support in which the lower end of said shaft is stepped, outer and` inner stationary shells or cones, as 19 and 34, and an intermediate shell or cone, as 23, hung to said shaft so as to rotate and to be vertically adjustable therewith and provided with openings to admit material into the inner chamber formed by the said three shells or cones, one of said stationary shells or cones being vertically adjustable independently of said rotating shell or cone.

3. In a vertical crushing-mill, the combination .with a central vertical driving-shaft, 20, provided near its lower end with a drivinggear 26, of a vertically-adjustable support in which the lower end of said shaft is stepped, 4

outer and inner stationary shells or cones, as 19 and 34, an intermediate shell or cone,vas 23, hung'to said shaft so as to rotate and to be 'vertically adjustable therewith and provided with openings to admit material into the inner chamber formed by the said three shells vor cones, a lighter-bar 35 on which the said inner cone or shell is supported, and means for Yvertically adjusting said lighterbar to effect the Vvertical adjustment of said inner stationarycone or shell independently of the vertical adjustment of the said intermediate rotating eone or shell.

4. In a vertical crushing-mill, the combination with a central'vertical driving-shaft, 20, provided near its lower end with a drivinggear 26, of a vertically-adjustable support in which the lower end of said shaft is stepped, outer and inner stationary shells or cones, as 19 and 34, an intermediate shell or cone, as 2,3, hung to said shaft so as to rotate and to be vertically adjustable therewith and provided with openings to admit material into the inner chamber formed by the said three shells or cones, and a vertically-adjustablc lighter-bar with which said inner cone or shell is loosely connected so as to be restrained from rotation, but so as to be self-centering.

In testimony whereof we aiiix our signatures in presence of two witnesses.

Jo CUsHMAN, C. M. SWEENEY.

lOO 

